![]() ![]() The Earth's mass is 5.9 x 10 24 kg while my mass is 90.6 kg. Gravity is the force of attraction created by two or more bodies with unequal mass. The displacement magnitude (d) of a 6-foot (arrested) fall would be denoted as: If we were to fall in a straight, vertical direction, our vector quantity of force has both magnitude (meters) and direction. The distance a body falls is also known as its force displacement value (d). V t = terminal velocity of arrest fall distance = d / tĪll forces, including the force of a falling body, can be measured by the effect of that force on a body's mass. ![]() That means that an applied force always has a vector (direction) and a magnitude (quantity) and displacement (distance):ĭ = force displacement (in meters)đ m = 3.2808 ft / 1 ft = 0.3048 m ![]() When we study fall force, we must consider it a vector quantity. However, most physicists agree that for the purpose of force analysis, a body's mass and weight are about equal at one unity of gravity (g). With an accurate enough scale, our body weight will actually increase very slightly as we move from the either pole toward the equator of the earth, but our mass will always remain constant. Gravity is a natural force of attraction established between two bodies with mass. Whenever a body (mass) falls from an elevation, we must know several factors if we are to arrest its terminal impact force (TIF). 1926.502(d) states that whenever self-retracting lifelines/lanyards automatically limit free fall distance to 2 feet or less, "they shall be capable of sustain a minimum tensile load of 3,000 pounds (13.3kN).".1926.502(d)(4) states that the D-rings and snap hooks in the system be proof-tested to 3600 (16kN) tensile strength "without cracking, breaking or taking permanent deformation.". ![]()
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